1. A laboratory of any college, university or school which is conducted for the training of its students, actively engaged in research and approved by the State Department of Education.
2. Laboratories operated by the Federal Government.
3. Laboratories operated by the State Department of Agriculture.
(Added to NRS by 1967, 926; A 1967, 1206; 1973, 660; 1993, 1894; 1999, 3740)